Access violation (0xc0000005) in build 3fbe5929f31adcda59ef6fbb3c058691328bbd83 accessing address 0000000000000A40 from 00007FFF1A293C33 The crash occurred in module 'amdxc64'. This module is related to AMD graphics driver. If this is a recurring issue...
For anybody experiencing the crash above 
please disable RTX Global Illumination in the meantime. This will be resolved in 1.9.2.